Full-closed automatic sampling system

Abstract

The utility model relates to a totally-closed automatic sampling system which comprises a sealed tank body for storing liquid, a sampling telescopic pipe is arranged in the tank body and ascends and descends through a traction mechanism, a sampling inlet is formed in the top end of the sampling telescopic pipe, and the bottom of the sampling telescopic pipe extends out of the tank body and then is connected with a sampling output pipe. The sampling output pipe is connected with a sampling self-control cabinet; the sampling self-control cabinet returns to the interior of the tank body through a tank return pipe; the sampling device further comprises fixing blocks fixed to the inner top face and the inner bottom face of the tank body, a guide rope is installed between the two fixing blocks, a plurality of fixing rings are arranged on the sampling telescopic pipe in the same vertical direction, and the guide rope penetrates through each fixing ring so as to play a role in fixing and guiding the sampling telescopic pipe. The full-automatic sampling device can ensure safe sampling, accurate sampling and environmental sanitation, can realize accurate and automatic sampling of the liquid level of the tank body at any height, and is suitable for full-automatic sampling of various tank bodies.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic sampling equipment, in particular to a fully enclosed automatic sampling system. Background Art

[0002] At present, in the prior art, there are mainly two forms of automatic sampling systems that are widely used:

[0003] One is to use a float / buoy to determine the liquid level position. Sampling ports are distributed proportionally at three points, namely the upper, middle, and lower parts of the sampling device in the tank, and a pneumatic or electric diaphragm pump is used for sampling. The use of this type of sampling system has certain limitations: it can only fix the three points of the existing liquid level in the sampling tank, and it is impossible to sample at any height; at the same time, when the tank is too high, the weight of the sampling device in the tank is too large, and when the buoyancy provided by the float / buoy is insufficient, this type of sampling system cannot be used; when the viscosity of the storage medium in the tank is relatively high, the guide frame / rope will adhere, resulting in inaccurate sampling.

[0004] The other is to use a motor traction, which can achieve sampling at any height in the tank, and the sampling height is more accurate. However, the use of this sampling system also has certain limitations: when the traction is at the top of the tank, the traction rope is generally outside the tank, resulting in the connection between the tank body and the atmosphere, which is not suitable for nitrogen-sealed tanks; the bottom traction is not suitable for the situation where the tank is too high and the buoyancy provided by the float / buoy is insufficient. At the same time, the bottom traction device is inconvenient to repair and is not suitable for sampling of media with more impurities.

[0005] Both of the above two forms of automatic sampling systems have limitations in use and need to be improved and upgraded. Content of the Utility Model

[0006] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides a fully enclosed automatic sampling system, so that its structure is simple, the operation is convenient, it can ensure safe sampling, accurate sampling, environmental hygiene, and can realize accurate automatic sampling of the liquid level at any height of the tank body, and is suitable for the application of full-automatic sampling of various tank bodies.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A fully enclosed automatic sampling system includes a sealed tank for storing liquid. A sampling telescopic pipe is installed inside the tank body. The sampling telescopic pipe is lifted and lowered by a traction mechanism. The top end of the sampling telescopic pipe is a sampling inlet. After the bottom of the sampling telescopic pipe extends out of the tank body, it is connected to a sampling output pipe. The sampling output pipe is connected to a sampling automatic control cabinet, and the sampling automatic control cabinet also returns to the inside of the tank body through a return pipe; it also includes fixing blocks fixed on the inner top surface and the inner bottom surface of the tank body. A guide rope is installed between the two fixing blocks. The sampling telescopic pipe is provided with a plurality of fixing rings arranged in the same vertical direction. The guide rope passes through each fixing ring, thereby playing a role in fixing and guiding the sampling telescopic pipe;

[0009] The structure of the sampling self-control cabinet is as follows: it includes the shell of the sampling self-control cabinet, a sampling self-control cabinet door panel is installed at the front end of the shell of the sampling self-control cabinet, a touch control screen is arranged inside the shell of the sampling self-control cabinet, a power-on / off knob and an alarm reset button are arranged below the touch control screen; a plurality of sample receiving bottles are also fixed inside the shell of the sampling self-control cabinet, a sample receiving port is arranged on each sample receiving bottle, a horizontally arranged sampling metering cylinder is arranged above the plurality of sample receiving bottles, one end of the sampling metering cylinder is communicated with a sampling output pipe through a pipeline, and a sampling pump and a sample injection pneumatic valve are installed on the pipeline, the middle part of the sampling metering cylinder is connected with a return tank pipe through a pipeline, and a sample return pneumatic valve is installed on the pipeline; a plurality of output ports are arranged at the bottom surface of the sampling metering cylinder, a single output port corresponds to the sample receiving port, and a sample discharging pneumatic valve is installed at the output port.

[0010] As a further improvement of the above technical solution:

[0011] The sampling telescopic pipe is made of thick-walled pipe.

[0012] Each bent part of the sampling telescopic pipe is communicated through a connecting pipe, and the connecting pipe is made of a flexible pipe.

[0013] A liquid level sensor is installed at the sampling inlet.

[0014] A liquid level alarm is arranged at the bottom position of one end of the sampling metering cylinder.

[0015] An exhaust pneumatic valve is arranged at the top position of one end of the sampling metering cylinder.

[0016] The sampling pump adopts a centrifugal pump, a gear pump or a diaphragm pump.

[0017] The structure of the traction mechanism is as follows: it includes a transmission shaft supported and installed on the top surface of the tank body, a lifting pulley one and a lifting pulley two are respectively installed at both ends of the transmission shaft, the lifting pulley one is fixed to the upper part of the sampling telescopic pipe through a first steel wire rope, and the lifting pulley two is connected to an electric lifting device through a second steel wire rope, and the electric lifting device is fixed outside the tank body.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The structure of the present utility model is compact and reasonable, and the operation is convenient. The external traction power of the tank is transmitted to the inside of the tank through the transmission shaft, so that the sampling device inside the tank can accurately and safely sample at any height liquid level, and is suitable for sampling of various tanks that need to be sealed or explosion-proof, such as nitrogen-sealed tanks.

[0020] The sampling device of this sampling system occupies a small space in the tank and can accurately reach the specified sampling position. Its sampling height can be transmitted to the sampling control cabinet in real time; it has automatic control and can be started with one key on-site or remotely. When sampling a large-scale oil tank group, only need to place the sampling bottle and click to run to automatically sample; it adopts a quantitative device to ensure consistent sampling each time and avoid losses caused by system misoperation; different heights can be set for multiple samplings in the same tank, and multiple samplings at multiple points can be automatically completed after one-key startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the present utility model.

[0022] Figure 2 is Figure 1 The partial enlarged view of part A in

[0023] Figure 3 is Figure 1 The partial enlarged view of part B in

[0024] <00> Figure 4 is Figure 1 The partial enlarged view of part C in

[0025] Figure 5 It is a schematic structural diagram of the sampling automatic control cabinet of the present utility model.

[0026] Figure 6 It is a schematic diagram of the internal structure of the sampling automatic control cabinet of the present utility model.

[0027] Wherein: 1, tank body; 2, sampling telescopic pipe; 3, connecting pipe; 4, sampling inlet; 5, guiding rope; 6, lifting pulley one; 7, transmission shaft; 8, lifting pulley two; 9, electric lifting device; 10, sampling automatic control cabinet; 11, sampling output pipe; 12, return pipe to tank.

[0028] 21, sampling automatic control cabinet shell; 22, sampling automatic control cabinet door panel; 23, touch control screen; 24, power on / off knob; 25, alarm reset button; 26, sample receiving port; 27, sample receiving bottle; 28, sample inlet pneumatic valve; 29, sampling pump; 30, liquid level alarm; 31, sampling quantitative cylinder; 32, sample discharging pneumatic valve; 33, exhaust pneumatic valve; 34, sample returning pneumatic valve. SPECIFIC EMBODIMENTS

[0029] The specific embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0030] As Figures 1-6As shown in the figure, the fully enclosed automatic sampling system of this embodiment includes a sealed tank body 1 for storing liquid. A sampling telescopic pipe 2 is installed inside the tank body 1. The sampling telescopic pipe 2 is lifted and lowered by a traction mechanism. The top end of the sampling telescopic pipe 2 is a sampling inlet 4. After the bottom of the sampling telescopic pipe 2 extends out of the tank body 1, it is connected to a sampling output pipe 11. The sampling output pipe 11 is connected to a sampling automatic control cabinet 10. The sampling automatic control cabinet 10 also returns to the inside of the tank body 1 through a return pipe 12. It also includes fixing blocks fixed on the inner top surface and inner bottom surface of the tank body 1. A guiding rope 5 is installed between the two fixing blocks. The sampling telescopic pipe 2 is provided with a plurality of fixing rings in the same vertical direction. The guiding rope 5 passes through each fixing ring, thereby playing a role in fixing and guiding the sampling telescopic pipe 2.

[0031] The structure of the sampling automatic control cabinet 10 is as follows: It includes a sampling automatic control cabinet housing 21. A sampling automatic control cabinet door panel 22 is installed at the front end of the sampling automatic control cabinet housing 21. A touch control screen 23 is arranged inside the sampling automatic control cabinet housing 21. Below the touch control screen 23, there are a power on / off knob 24 and an alarm reset button 25. A plurality of sample receiving bottles 27 are also fixed inside the sampling automatic control cabinet housing 21. Each sample receiving bottle 27 is provided with a sample receiving port 26. Above the plurality of sample receiving bottles 27, there is a horizontally arranged sampling metering cylinder 31. One end of the sampling metering cylinder 31 is connected to the sampling output pipe 11 through a pipeline, and a sampling pump 29 and a sample injection pneumatic valve 28 are installed on the pipeline. The middle part of the sampling metering cylinder 31 is connected to the return pipe 12 through a pipeline, and a sample return pneumatic valve 34 is installed on the pipeline. The bottom surface of the sampling metering cylinder 31 is provided with a plurality of output ports. A single output port corresponds to the sample receiving port 26, and a sample discharging pneumatic valve 32 is installed at the output port.

[0032] The sampling telescopic pipe 2 is made of a thick-walled pipe.

[0033] Each bending part of the sampling telescopic pipe 2 is connected through a connecting pipe 3. The connecting pipe 3 is made of a flexible pipe.

[0034] A liquid level sensor is installed at the sampling inlet 4.

[0035] A liquid level alarm 30 is arranged at the bottom position of one end of the sampling metering cylinder 31.

[0036] An exhaust pneumatic valve 33 is arranged at the top position of one end of the sampling metering cylinder 31.

[0037] The sampling pump 29 is a centrifugal pump, a gear pump or a diaphragm pump.

[0038] The structure of the traction mechanism is as follows: It includes a transmission shaft 7 supported and installed on the top surface of the tank body 1. Lifting pulleys one 6 and two 8 are respectively installed at both ends of the transmission shaft 7. The lifting pulley one 6 is fixed to the upper part of the sampling telescopic pipe 2 through a first steel wire rope. The lifting pulley two 8 is connected to an electric lifting device 9 through a second steel wire rope. The electric lifting device 9 is fixed outside the tank body 1.

[0039] The specific structure and functions of the fully enclosed automatic sampling system of the present utility model are as follows:

[0040] It mainly includes a sampling telescopic pipe 2, which is connected by a connecting pipe 3. The top end of the sampling telescopic pipe 2 is a sampling inlet 4, and the bottom end of the sampling telescopic pipe 2 is connected to a sampling output pipe 11 outside the tank body 1. The sampling telescopic pipe 2 is fixed by a guiding rope 5. The sampling telescopic pipe 2 at the sampling inlet 4 is connected to a lifting pulley 6 by a steel wire rope. By rotating the lifting pulley 6, the steel wire rope moves up and down, thereby driving the sampling telescopic pipe 2 to move up and down (i.e., telescopic movement). The lifting pulley 6 and the lifting pulley 8 are both independent systems, and the two are linked by a transmission shaft 7 to achieve synchronous rotation. The lifting pulley 8 is connected to an electric lifting device 9 through its own steel wire rope and rotates synchronously through the rotation of the electric lifting device 9. The sampling automatic control cabinet 10 is connected to the sampling output pipe 11 of the tank body 1 for the inflow of the medium in the tank, and the sampling automatic control cabinet 10 is connected to the return pipe line 12 of the tank body 1 for the medium to flow back into the tank.

[0041] The sampling telescopic pipe 2 is a thick-walled pipe and is connected by a connecting pipe 3. The connecting pipe 3 is made of a flexible pipe. The sampling telescopic pipe 2 can move up and down along the guiding rope 5. One end of the guiding rope 5 is connected to the bottom plate of the tank body 1, and the other end is connected to the top plate of the tank body 1.

[0042] The top end of the sampling telescopic pipe 2 is a sampling inlet 4, and there is a liquid level sensor on the sampling inlet 4, which can transmit the liquid level height of the sampling inlet 4 in the tank body 1 to the sampling automatic control cabinet 10 in real time, so that the sampling inlet 4 can accurately reach the specified position for sampling.

[0043] The transmission shaft 7 contains a seal, which completely isolates the components of the sampler inside the tank body 1 from the outside world, and is a fully enclosed sampling, suitable for fully sealed tank bodies such as nitrogen-sealed tanks.

[0044] The core working components of the sampling automatic control cabinet 10 are composed of a sampling pneumatic valve 28, a sampling pump 29, a liquid level alarm 30, a sampling metering cylinder 31, a sample discharging pneumatic valve 32, an exhaust pneumatic valve 33, and a sample returning pneumatic valve 34. The above components are all inside the shell 21 of the sampling automatic control cabinet. The core automatic control components of the sampling automatic control cabinet 10 are composed of a touch control screen 23, a power on / off knob 24, and an alarm reset button 25. The sampling of the sampling automatic control cabinet 10 is completed through a sample receiving port 26 and a sample receiving bottle 27. A sampling automatic control cabinet door panel 22 is provided on the surface of the sampling automatic control cabinet 10. The above components together constitute the sampling automatic control cabinet 10.

[0045] The touch control screen 23 includes a control module and a wireless module. By operating the touch control screen 23, on-site / remote / mobile parameter setting, on-site / remote / mobile startup, and automatic sampling can be achieved. After setting the sampling height, the pneumatic valve group switch and the start / stop of the sampling pump 29 can be automatically completed. Up to three different sampling heights can be set at a time. The height of the sampling inlet 4 in the tank and the real-time working status of the system can be remotely transmitted to the plant-wide control system.

[0046] For the sample injection pneumatic valve 28, sample discharge pneumatic valve 32, exhaust pneumatic valve 33, and sample return pneumatic valve 34, according to the on-site situation, in addition to pneumatic valves, solenoid valves, etc. can also be selected.

[0047] The sampling pump 29 can be a centrifugal pump, gear pump, diaphragm pump, etc. according to the on-site situation and the characteristics of the medium.

[0048] During the actual working process, the medium in the tank body 1 is liquid. When sampling is required, the operation steps are as follows:

[0049] First step: Rotate the power on / off knob 24 to power on the system. After the system is fully started, the real-time status of the system such as the sampling inlet 4 and the valve switch status can be observed through the touch control screen 23, the plant-wide control system, or the mobile control system.

[0050] Second step: Check the actual status of the system on-site. After confirming that the system is normal, place the sampling bottle 27 under the sample receiving port 26 and then close the door panel 22 of the sampling automatic control cabinet.

[0051] Third step: After setting parameters such as the sampling height, the circulation duration of the sampling pump 29, and the sample discharge duration through the touch control screen 23, the plant-wide control system, or the mobile control system, click "Run". The system will prompt "Please check whether the system status is normal". If it is normal, select "Yes", and the system will start automatic sampling; if "No" is selected, the system will not run and will return to the "Run" click interface until it is confirmed that the system is normal and "Yes" is selected before starting automatic sampling.

[0052] Fourth step: Taking the setting of three sampling points as an example. When the system automatically samples, the electric lifting device 9 starts, drives the lifting pulley two 8 to rotate through the second steel wire rope, and the lifting pulley two 8 then drives the lifting pulley one 6 to rotate through the transmission shaft 7. The lifting pulley one 6 drives the sampling telescopic tube 2 through the first steel wire rope, thereby adjusting the height of the sampling inlet 4.

[0053] After the system confirms that the set first sampling height has been reached based on feedback from the liquid level sensor on the sampling inlet 4, it opens the sampling pneumatic valve 28 and the sample return pneumatic valve 34, starts the sampling pump 29, and after the set cycle time has been reached, closes the sampling pump 29, the sampling pneumatic valve 28, and the sample return pneumatic valve 34, opens the exhaust pneumatic valve 33 and the sample placement pneumatic valve 32, and begins to receive the sample from the sample bottle 27. When the set sample placement time has been reached or the liquid level alarm 30 sounds, the exhaust pneumatic valve 33 and the sample placement pneumatic valve 32 are closed, completing sampling at the first sampling height.

[0054] Then the system starts to run, and the working steps are as above, reaching the second sampling height and completing the sampling;

[0055] The system continues to reach the third sampling height and completes sampling.

[0056] Step 5: After all the sampling set by the system is completed, a prompt "Sampling is completed, please send samples as soon as possible" will pop up in the operating system. After taking the samples on site, click "OK" in the system. The system will complete a multi-point sampling cycle and enter standby mode.

[0057] Step 6: During the operation of the system, if a fault occurs, the system will issue a fault alarm and stop working at the same time. All pneumatic valves and sampling pumps 29 will be closed, and the alarm reset button 25 will light up. After the fault is eliminated and the alarm reset button 25 is clicked, the system can continue to operate.

[0058] The system is easy to operate, has good working reliability and high precision.

[0059] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A fully enclosed automatic sampling system, characterized in that: It includes a tank body (1) for storing liquid. A sampling telescopic pipe (2) is installed inside the tank body (1). The sampling telescopic pipe (2) is lifted and lowered by a traction mechanism. The top end of the sampling telescopic pipe (2) is a sampling inlet (4). After the bottom of the sampling telescopic pipe (2) extends out of the tank body (1), it is connected to a sampling output pipe (11). The sampling output pipe (11) is connected to a sampling automatic control cabinet (10). The sampling automatic control cabinet (10) also returns to the inside of the tank body (1) through a return pipe (12); it also includes fixing blocks fixed on the inner top surface and inner bottom surface of the tank body (1). A guiding rope (5) is installed between the two fixing blocks. A plurality of fixing rings are arranged on the sampling telescopic pipe (2) in the same vertical direction. The guiding rope (5) passes through each fixing ring, so as to play a role in fixing and guiding the sampling telescopic pipe (2); the structure of the sampling automatic control cabinet (10) is: it includes a sampling automatic control cabinet housing (21). A sampling automatic control cabinet door panel (22) is installed at the front end of the sampling automatic control cabinet housing (21). A touch control screen (23) is arranged inside the sampling automatic control cabinet housing (21). Below the touch control screen (23), there are a power-on / off knob (24) and an alarm reset button (25); a plurality of sample receiving bottles (27) are also fixed inside the sampling automatic control cabinet housing (21). Each sample receiving bottle (27) is provided with a sample receiving port (26). Above the plurality of sample receiving bottles (27), there is a horizontally arranged sampling metering cylinder (31). One end of the sampling metering cylinder (31) is communicated with the sampling output pipe (11) through a pipeline, and a sampling pump (29) and a sample inlet pneumatic valve (28) are installed on the pipeline. The middle part of the sampling metering cylinder (31) is connected to the return pipe (12) through a pipeline, and a sample return pneumatic valve (34) is installed on the pipeline; the bottom surface of the sampling metering cylinder (31) is provided with a plurality of output ports. A single output port corresponds to the sample receiving port (26), and a sample discharging pneumatic valve (32) is installed at the output port.

2. The fully enclosed automatic sampling system according to claim 1, wherein: The sampling telescopic pipe (2) is made of a thick-walled pipe.

3. The fully enclosed automatic sampling system according to claim 1, wherein: Each bent part of the sampling telescopic pipe (2) is communicated through a connecting pipe (3). The connecting pipe (3) is made of a flexible pipe.

4. The fully enclosed automatic sampling system according to claim 1, wherein: A liquid level sensor is installed at the sampling inlet (4).

5. The fully enclosed automatic sampling system according to claim 1, wherein: A liquid level alarm (30) is arranged at the bottom position of one end of the sampling metering cylinder (31).

6. The fully enclosed automatic sampling system according to claim 1, wherein: An exhaust pneumatic valve (33) is arranged at the top position of one end of the sampling metering cylinder (31).

7. The fully enclosed automatic sampling system according to claim 1, wherein: The sampling pump (29) is a centrifugal pump, a gear pump or a diaphragm pump.

8. The fully enclosed automatic sampling system according to claim 1, wherein: The structure of the traction mechanism is: it includes a transmission shaft (7) supported and installed on the top surface of the tank body (1). A lifting pulley one (6) and a lifting pulley two (8) are respectively installed at both ends of the transmission shaft (7). The lifting pulley one (6) is fixed to the upper part of the sampling telescopic pipe (2) through a first steel wire rope. The lifting pulley two (8) is connected to an electric lifting device (9) through a second steel wire rope. The electric lifting device (9) is fixed outside the tank body (1).

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